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[thirdparty/gcc.git] / libquadmath / configure.ac
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1# Process this file with autoconf to produce a configure script, like so:
2# aclocal && autoconf && autoheader && automake
3
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4AC_INIT([GCC Quad-precision Math Library], 0.1,,[libquadmath])
5AC_CONFIG_HEADER(config.h)
6
7# Gets build, host, target, *_vendor, *_cpu, *_os, etc.
8#
9# You will slowly go insane if you do not grok the following fact: when
10# building this library, the top-level /target/ becomes the library's /host/.
11#
12# configure then causes --target to default to --host, exactly like any
13# other package using autoconf. Therefore, 'target' and 'host' will
14# always be the same. This makes sense both for native and cross compilers
15# just think about it for a little while. :-)
16#
17# Also, if this library is being configured as part of a cross compiler, the
18# top-level configure script will pass the "real" host as $with_cross_host.
19#
20# Do not delete or change the following two lines. For why, see
21# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
22AC_CANONICAL_SYSTEM
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23ACX_NONCANONICAL_TARGET
24
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MK
25AM_ENABLE_MULTILIB(, ..)
26
1ec601bf 27target_alias=${target_alias-$host_alias}
fabfcf5e 28AC_SUBST(target_alias)
1ec601bf 29
a6098a28 30AM_INIT_AUTOMAKE([1.9.0 foreign subdir-objects no-dist -Wall -Wno-override -Werror])
1ec601bf 31
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32AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
33AC_ARG_ENABLE(version-specific-runtime-libs,
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34AS_HELP_STRING([--enable-version-specific-runtime-libs],
35 [specify that runtime libraries should be installed in a compiler-specific directory]),
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36[case "$enableval" in
37 yes) version_specific_libs=yes ;;
38 no) version_specific_libs=no ;;
39 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
40 esac],
41[version_specific_libs=no])
42AC_MSG_RESULT($version_specific_libs)
43
fabfcf5e 44GCC_NO_EXECUTABLES
1ec601bf 45
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46AC_USE_SYSTEM_EXTENSIONS
47
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48# See if makeinfo has been installed and is modern enough
49# that we can use it.
50ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
51 [GNU texinfo.* \([0-9][0-9.]*\)],
52 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
53AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
54
19e30111 55ACX_BUGURL([https://gcc.gnu.org/bugs/])
4c993c44 56
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57# Configure libtool
58AM_PROG_LIBTOOL
7de6ba7a 59ACX_LT_HOST_FLAGS
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60AC_SUBST(enable_shared)
61AC_SUBST(enable_static)
62
63AM_MAINTAINER_MODE
1ec601bf 64
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65AC_LANG_C
66# The same as in boehm-gc and libstdc++. Have to borrow it from there.
67# We must force CC to /not/ be precious variables; otherwise
68# the wrong, non-multilib-adjusted value will be used in multilibs.
69# As a side effect, we have to subst CFLAGS ourselves.
70
71m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
72m4_define([_AC_ARG_VAR_PRECIOUS],[])
73AC_PROG_CC
74m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
75
76AC_SUBST(CFLAGS)
77
78AM_PROG_CC_C_O
79
80if test "x$GCC" != "xyes"; then
81 AC_MSG_ERROR([libquadmath must be built with GCC])
82fi
83AC_PROG_CPP
84
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85# Calculate toolexeclibdir
86# Also toolexecdir, though it's only used in toolexeclibdir
87case ${version_specific_libs} in
88 yes)
89 # Need the gcc compiler version to know where to install libraries
90 # and header files if --enable-version-specific-runtime-libs option
91 # is selected.
92 toolexecdir='$(libdir)/gcc/$(target_alias)'
93 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
94 ;;
95 no)
96 if test -n "$with_cross_host" &&
97 test x"$with_cross_host" != x"no"; then
98 # Install a library built with a cross compiler in tooldir, not libdir.
99 toolexecdir='$(exec_prefix)/$(target_alias)'
100 toolexeclibdir='$(toolexecdir)/lib'
101 else
102 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
103 toolexeclibdir='$(libdir)'
104 fi
105 multi_os_directory=`$CC -print-multi-os-directory`
106 case $multi_os_directory in
107 .) ;; # Avoid trailing /.
108 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
109 esac
110 ;;
111esac
112AC_SUBST(toolexecdir)
113AC_SUBST(toolexeclibdir)
114
d2995f21 115AC_CHECK_HEADERS(fenv.h langinfo.h locale.h wchar.h wctype.h limits.h ctype.h printf.h errno.h)
5a09d908 116LIBQUAD_CHECK_MATH_H_SIGNGAM
e8d42d28 117
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118# If available, sqrtl and cbrtl speed up the calculation -
119# but they are not required
120if test x$gcc_no_link != xyes; then
121 AC_CHECK_LIB([m],[sqrtl],[AC_DEFINE([HAVE_SQRTL],[1],[libm includes sqrtl])])
122 AC_CHECK_LIB([m],[cbrtl],[AC_DEFINE([HAVE_CBRTL],[1],[libm includes cbrtl])])
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123 AC_CHECK_LIB([m],[feholdexcept],[AC_DEFINE([HAVE_FEHOLDEXCEPT],[1],[libm includes feholdexcept])])
124 AC_CHECK_LIB([m],[fesetround],[AC_DEFINE([HAVE_FESETROUND],[1],[libm includes fesetround])])
125 AC_CHECK_LIB([m],[feupdateenv],[AC_DEFINE([HAVE_FEUPDATEENV],[1],[libm includes feupdateenv])])
126 AC_CHECK_LIB([m],[fesetenv],[AC_DEFINE([HAVE_FESETENV],[1],[libm includes fesetenv])])
127 AC_CHECK_LIB([m],[fetestexcept],[AC_DEFINE([HAVE_FETESTEXCEPT],[1],[libm includes fetestexcept])])
a855debf 128 AC_CHECK_FUNCS(strtoull)
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129else
130 if test "x$ac_cv_lib_m_sqrtl" = x""yes; then
131 AC_DEFINE([HAVE_SQRTL],[1],[libm includes sqrtl])
132 fi
133 if test "x$ac_cv_lib_m_cbrtl" = x""yes; then
134 AC_DEFINE([HAVE_CBRTL],[1],[libm includes cbrtl])
135 fi
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136 if test "x$ac_cv_lib_m_feholdexcept" = x""yes; then
137 AC_DEFINE([HAVE_FEHOLDEXCEPT],[1],[libm includes feholdexcept])
138 fi
139 if test "x$ac_cv_lib_m_fesetround" = x""yes; then
140 AC_DEFINE([HAVE_FESETROUND],[1],[libm includes fesetround])
141 fi
142 if test "x$ac_cv_lib_m_feupdateenv" = x""yes; then
143 AC_DEFINE([HAVE_FEUPDATEENV],[1],[libm includes feupdateenv])
144 fi
145 if test "x$ac_cv_lib_m_fesetenv" = x""yes; then
146 AC_DEFINE([HAVE_FESETENV],[1],[libm includes fesetenv])
147 fi
148 if test "x$ac_cv_lib_m_fetestexcept" = x""yes; then
149 AC_DEFINE([HAVE_FETESTEXCEPT],[1],[libm includes fetestexcept])
150 fi
6f468984 151fi
1ec601bf 152
1d92226b 153# Check for hidden visibility (copied from libssp).
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154saved_CFLAGS="$CFLAGS"
155CFLAGS="$CFLAGS -Werror"
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156AC_MSG_CHECKING([whether hidden visibility is supported])
157AC_TRY_COMPILE([
158void __attribute__((visibility ("hidden"))) bar (void) {}],,
159[quadmath_hidden=yes],[quadmath_hidden=no])
160AC_MSG_RESULT($quadmath_hidden)
161if test x$quadmath_hidden = xyes; then
162 AC_DEFINE([HAVE_HIDDEN_VISIBILITY],[1],[__attribute__((visibility ("hidden"))) supported])
163fi
49f0e1ba 164CFLAGS="$saved_CFLAGS"
1d92226b 165
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166# Check for symbol versioning (copied from libssp).
167AC_MSG_CHECKING([whether symbol versioning is supported])
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168AC_ARG_ENABLE(symvers,
169AS_HELP_STRING([--disable-symvers],
170 [disable symbol versioning for libquadmath]),
171quadmath_use_symver=$enableval,
172quadmath_use_symver=yes)
19af62db 173if test "x$quadmath_use_symver" != xno; then
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174 if test x$gcc_no_link = xyes; then
175 # If we cannot link, we cannot build shared libraries, so do not use
176 # symbol versioning.
177 quadmath_use_symver=no
178 else
179 save_LDFLAGS="$LDFLAGS"
180 LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map"
181 cat > conftest.map <<EOF
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182FOO_1.0 {
183 global: *foo*; bar; local: *;
184};
185EOF
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186 AC_TRY_LINK([int foo;],[],[quadmath_use_symver=gnu],[quadmath_use_symver=no])
187 if test x$quadmath_use_symver = xno; then
188 case "$target_os" in
189 solaris2*)
190 LDFLAGS="$save_LDFLAGS"
191 LDFLAGS="$LDFLAGS -fPIC -shared -Wl,-M,./conftest.map"
192 # Sun ld cannot handle wildcards and treats all entries as undefined.
193 cat > conftest.map <<EOF
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194FOO_1.0 {
195 global: foo; local: *;
196};
197EOF
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198 AC_TRY_LINK([int foo;],[],[quadmath_use_symver=sun],[quadmath_use_symver=no])
199 ;;
200 esac
201 fi
202 LDFLAGS="$save_LDFLAGS"
fabfcf5e 203 fi
1ec601bf 204fi
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205AC_MSG_RESULT($quadmath_use_symver)
206AM_CONDITIONAL(LIBQUAD_USE_SYMVER, [test "x$quadmath_use_symver" != xno])
207AM_CONDITIONAL(LIBQUAD_USE_SYMVER_GNU, [test "x$quadmath_use_symver" = xgnu])
208AM_CONDITIONAL(LIBQUAD_USE_SYMVER_SUN, [test "x$quadmath_use_symver" = xsun])
209
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210AC_CACHE_CHECK([whether __float128 is supported], [libquad_cv_have_float128],
211 [GCC_TRY_COMPILE_OR_LINK([
0c949f0a 212 #if (!defined(_ARCH_PPC)) || defined(__LONG_DOUBLE_IEEE128__)
1ec601bf 213 typedef _Complex float __attribute__((mode(TC))) __complex128;
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214 #else
215 typedef _Complex float __attribute__((mode(KC))) __complex128;
216 #endif
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217
218 __float128 foo (__float128 x)
219 {
220
221 __complex128 z1, z2;
222
223 z1 = x;
224 z2 = x / 7.Q;
225 z2 /= z1;
226
227 return (__float128) z2;
228 }
229
230 __float128 bar (__float128 x)
231 {
232 return x * __builtin_huge_valq ();
233 }
234 ],[
235 foo (1.2Q);
236 bar (1.2Q);
237 ],[
abccc9a9 238 libquad_cv_have_float128=yes
1ec601bf 239 ],[
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240 libquad_cv_have_float128=no
241])])
242AM_CONDITIONAL(BUILD_LIBQUADMATH, [test "x$libquad_cv_have_float128" = xyes])
1ec601bf 243
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244# Check for printf hook support.
245AC_MSG_CHECKING([whether printf hooks are supported])
246AC_TRY_COMPILE([
247#include <printf.h>
248#include <stdarg.h>
249#include <stdlib.h>
250extern void flt128_va (void *, va_list *);
251extern int flt128_ais (const struct printf_info *, size_t, int *, int *);
252extern int flt128_printf_fp (FILE *, const struct printf_info *, const void *const *);
253],[
254int pa_flt128 = register_printf_type (flt128_va);
255int mod_Q = register_printf_modifier (L"Q");
256int res = register_printf_specifier ('f', flt128_printf_fp, flt128_ais);
12967872 257struct printf_info info = { .user = -1 };
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258],
259[quadmath_printf_hooks=yes],[quadmath_printf_hooks=no])
260AC_MSG_RESULT($quadmath_printf_hooks)
261if test x$quadmath_printf_hooks = xyes; then
262 AC_DEFINE([HAVE_PRINTF_HOOKS],[1],[GNU C Library stype printf hooks supported])
263fi
264
265# Check for whether locale support for quadmath_snprintf or Q printf hooks
266# should be provided.
d2995f21 267AC_MSG_CHECKING([whether nl_langinfo should be used])
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268AC_TRY_COMPILE([#include <langinfo.h>],[
269const char *s;
270s = nl_langinfo (DECIMAL_POINT);
271s = nl_langinfo (MON_DECIMAL_POINT);
272s = nl_langinfo (GROUPING);
273s = nl_langinfo (MON_GROUPING);
274s = nl_langinfo (THOUSANDS_SEP);
275s = nl_langinfo (MON_THOUSANDS_SEP);
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276(void) s;
277],
278[quadmath_use_nl_langinfo=yes],[quadmath_use_nl_langinfo=no])
279AC_MSG_RESULT($quadmath_use_nl_langinfo)
280if test x$quadmath_use_nl_langinfo = xyes; then
281 AC_DEFINE([USE_NL_LANGINFO],[1],[whether nl_langinfo should be used])
282fi
283
284AC_MSG_CHECKING([whether nl_langinfo should be used for wide char locale info])
285AC_TRY_COMPILE([#include <langinfo.h>],[
286const char *s;
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287s = nl_langinfo (_NL_NUMERIC_DECIMAL_POINT_WC);
288s = nl_langinfo (_NL_MONETARY_DECIMAL_POINT_WC);
289s = nl_langinfo (_NL_NUMERIC_THOUSANDS_SEP_WC);
290s = nl_langinfo (_NL_MONETARY_THOUSANDS_SEP_WC);
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291(void) s;
292],
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293[quadmath_use_nl_langinfo_wc=yes],[quadmath_use_nl_langinfo_wc=no])
294AC_MSG_RESULT($quadmath_use_nl_langinfo_wc)
295if test x$quadmath_use_nl_langinfo_wc = xyes; then
296 AC_DEFINE([USE_NL_LANGINFO_WC],[1],[whether nl_langinfo should be used for wide char locale info])
297fi
298
299AC_MSG_CHECKING([whether localeconv should be used])
300AC_TRY_COMPILE([#include <locale.h>],[
301const struct lconv *l = localeconv ();
302const char *s;
303s = l->decimal_point;
304s = l->mon_decimal_point;
305s = l->grouping;
306s = l->mon_grouping;
307s = l->thousands_sep;
308s = l->mon_thousands_sep;
309(void) s;
310],
311[quadmath_use_localeconv=yes],[quadmath_use_localeconv=no])
312AC_MSG_RESULT($quadmath_use_localeconv)
313if test x$quadmath_use_localeconv = xyes; then
314 AC_DEFINE([USE_LOCALECONV],[1],[whether localeconv should be used])
1d92226b
JJ
315fi
316
317# Check for whether i18n number rewriting support for quadmath_snprintf
318# or Q printf hooks should be provided.
319AC_MSG_CHECKING([whether i18n number rewriting support for quadmath_snprintf should be added])
320AC_TRY_COMPILE([#include <langinfo.h>
321#include <limits.h>
322#include <string.h>
323#include <wchar.h>
324#include <wctype.h>],[
325const char *s;
326char decimal[MB_LEN_MAX];
327wctrans_t map = wctrans ("to_outpunct");
328wint_t wdecimal = towctrans (L'.', map);
329mbstate_t state;
330memset (&state, '\0', sizeof (state));
331wcrtomb (decimal, wdecimal, &state);
332s = nl_langinfo (_NL_CTYPE_OUTDIGIT0_MB);
333s = nl_langinfo (_NL_CTYPE_OUTDIGIT0_WC);
d2995f21 334s = nl_langinfo (_NL_CTYPE_MB_CUR_MAX);
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JJ
335(void) s;
336],
337[quadmath_use_i18n_number_h=yes],[quadmath_use_i18n_number_h=no])
338AC_MSG_RESULT($quadmath_use_i18n_number_h)
339if test x$quadmath_use_i18n_number_h = xyes; then
340 AC_DEFINE([USE_I18N_NUMBER_H],[1],[whether i18n number rewriting can be supported])
341fi
342
fda26abe
IT
343# Add CET specific flags if CET is enabled
344GCC_CET_FLAGS(CET_FLAGS)
345XCFLAGS="$XCFLAGS $CET_FLAGS"
346AC_SUBST(XCFLAGS)
347
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348AC_CACHE_SAVE
349
350if test ${multilib} = yes; then
351 multilib_arg="--enable-multilib"
352else
353 multilib_arg=
354fi
355
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356
357# We would like our source tree to be readonly. However when releases or
358# pre-releases are generated, the flex/bison generated files as well as the
359# various formats of manuals need to be included along with the rest of the
360# sources. Therefore we have --enable-generated-files-in-srcdir to do
361# just that.
362AC_MSG_CHECKING(generated-files-in-srcdir)
363AC_ARG_ENABLE(generated-files-in-srcdir,
364AS_HELP_STRING([--enable-generated-files-in-srcdir],
365 [put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex]),
366[case "$enableval" in
367 yes) enable_generated_files_in_srcdir=yes ;;
368 no) enable_generated_files_in_srcdir=no ;;
369 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
370 esac],
371[enable_generated_files_in_srcdir=no])
372AC_MSG_RESULT($enable_generated_files_in_srcdir)
373AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
374
3c36aa6b
JJ
375# Determine what GCC version number to use in filesystem paths.
376GCC_BASE_VER
4c993c44 377
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378AC_CONFIG_FILES(Makefile)
379AC_OUTPUT